399 imperial cups in US customary cups
Result
The conversion result is: 399 imperial cups is equivalent to 479.179020276437 US customary cups.[1]
Conversion formula
How to convert 399 imperial cups to US customary cups?
We know (by definition) that: 1 brcup ≈ 1.20094992550486 uscup.
We can set up a proportion to solve for the number of US customary cups.
1 brcup / 399 brcup ≈ 1.20094992550486 uscup / x uscup
Now, we cross multiply to solve for our unknown x:
x uscup ≈ (399 brcup / 1 brcup) * 1.20094992550486 uscup → x uscup ≈ 479.1790202764391 uscup
Conclusion:
399 brcup ≈ 479.1790202764391 uscup
Conversion in the opposite direction
The inverse of the conversion factor is that 1 US customary cup is equal to 0.00208690271836839 times 399 imperial cups.
It can also be expressed as: 399 imperial cups is equal to 1 / 0.00208690271836839 US customary cups.
Approximation
An approximate numerical result would be: three hundred and ninety-nine imperial cups is about four hundred and seventy-nine point one eight US customary cups, or alternatively, a US customary cup is about zero times three hundred and ninety-nine imperial cups.
Footnotes
[1] The precision is 15 significant digits (fourteen digits to the right of the decimal point).
Results may contain small errors due to the use of floating point arithmetic.